GOB: Add class RXYFile

Handles RXY files, containing relative sprite coordinates.
Used in hardcoded "actiony" parts of gob games, like
Geisha's minigames.

3 files changed, 159 insertions, 0 deletions

diff --git a/engines/gob/module.mk b/engines/gob/module.mk
index 0300bcc3f0..a0269649a3 100644
--- a/engines/gob/module.mk
+++ b/engines/gob/module.mk
@@ -53,6 +53,7 @@ MODULE_OBJS := \
 	mult_v2.o \
 	palanim.o \
 	resources.o \
+	rxyfile.o \
 	scenery.o \
 	scenery_v1.o \
 	scenery_v2.o \
diff --git a/engines/gob/rxyfile.cpp b/engines/gob/rxyfile.cpp
new file mode 100644
index 0000000000..5311eece0f
--- /dev/null
+++ b/engines/gob/rxyfile.cpp
@@ -0,0 +1,82 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "common/stream.h"
+
+#include "gob/rxyfile.h"
+
+namespace Gob {
+
+RXYFile::RXYFile(Common::SeekableReadStream &rxy) : _width(0), _height(0) {
+	load(rxy);
+}
+
+RXYFile::~RXYFile() {
+}
+
+uint RXYFile::size() const {
+	return _coords.size();
+}
+
+uint16 RXYFile::getWidth() const {
+	return _width;
+}
+
+uint16 RXYFile::getHeight() const {
+	return _height;
+}
+
+uint16 RXYFile::getRealCount() const {
+	return _realCount;
+}
+
+const RXYFile::Coordinates &RXYFile::operator[](uint i) const {
+	assert(i < _coords.size());
+
+	return _coords[i];
+}
+
+void RXYFile::load(Common::SeekableReadStream &rxy) {
+	if (rxy.size() < 2)
+		return;
+
+	rxy.seek(0);
+
+	_realCount = rxy.readUint16LE();
+
+	uint16 count = (rxy.size() - 2) / 8;
+
+	_coords.resize(count);
+	for (CoordArray::iterator c = _coords.begin(); c != _coords.end(); ++c) {
+		c->left   = rxy.readUint16LE();
+		c->right  = rxy.readUint16LE();
+		c->top    = rxy.readUint16LE();
+		c->bottom = rxy.readUint16LE();
+
+		if (c->left != 0xFFFF) {
+			_width  = MAX<uint16>(_width , c->right  + 1);
+			_height = MAX<uint16>(_height, c->bottom + 1);
+		}
+	}
+}
+
+} // End of namespace Gob
diff --git a/engines/gob/rxyfile.h b/engines/gob/rxyfile.h
new file mode 100644
index 0000000000..828f8b73c7
--- /dev/null
+++ b/engines/gob/rxyfile.h
@@ -0,0 +1,76 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef GOB_RXYFILE_H
+#define GOB_RXYFILE_H
+
+#include "common/system.h"
+#include "common/array.h"
+
+namespace Common {
+	class SeekableReadStream;
+}
+
+namespace Gob {
+
+/** A RXY file, containing relative sprite coordinates.
+ *
+ *  Used in hardcoded "actiony" parts of gob games.
+ */
+class RXYFile {
+public:
+	struct Coordinates {
+		uint16 left;
+		uint16 top;
+		uint16 right;
+		uint16 bottom;
+	};
+
+	RXYFile(Common::SeekableReadStream &rxy);
+	~RXYFile();
+
+	uint size() const;
+
+	uint16 getWidth () const;
+	uint16 getHeight() const;
+
+	uint16 getRealCount() const;
+
+	const Coordinates &operator[](uint i) const;
+
+private:
+	typedef Common::Array<Coordinates> CoordArray;
+
+	CoordArray _coords;
+
+	uint16 _realCount;
+
+	uint16 _width;
+	uint16 _height;
+
+
+	void load(Common::SeekableReadStream &rxy);
+};
+
+} // End of namespace Gob
+
+#endif // GOB_RXYFILE_H